What are the characteristics of action script files? NOTE: There are 2 correct answers to this question.

What are the characteristics of action script files? NOTE: There are 2 correct answers to this question.
A . Defined for custom business objects.
B. Have at least one input parameter
C. Have NO return Values
D. Defined for extension business objects
E. Implemented using Business Object Definition Language (BODL)

Answer: B,C,D